// @algorithm @lc id=1009 lang=cpp 
// @title pancake-sorting


#include <iostream>
#include <vector>
#include <string>
#include "algm/algm.h"
using namespace std;
// @test([3,2,4,1])=[4,2,4,3]
// @test([1,2,3])=[]
class Solution {
public:
    vector<int> pancakeSort(vector<int>& arr) {
        
    }
};